MIEN1 is tightly regulated by SINE Alu methylation in its promoter

Smrithi Rajendiran, Lee D. Gibbs, Timothy Van Treuren, David L. Klinkebiel, Jamboor K. Vishwanatha

Research output: Contribution to journalArticle

5 Citations (Scopus)

Abstract

Migration and invasion enhancer 1 (MIEN1) is a novel gene involved in prostate cancer progression by enhancing prostate cancer cell migration and invasion. DNA methylation, an important epigenetic regulation, is one of the most widely altered mechanisms in prostate cancer. This phenomenon frames the basis to study the DNA methylation patterns in the promoter region of MIEN1. Bisulfite pyrosequencing demonstrates the MIEN1 promoter contains a short interspersed nuclear Alu element (SINE Alu) repeat sequence. Validation of methylation inhibition on MIEN1 was performed using nucleoside analogs and non-nucleoside inhibitors and resulted in an increase in both MIEN1 RNA and protein in normal cells. MIEN1 mRNA and protein increases upon inhibition of individual DNA methyltransferases using RNA interference technologies. Furthermore, dual luciferase reporter assays, in silico analysis, and chromatin immunoprecipitation assays identified a sequence upstream of the transcription start site that has a site for binding of the USF transcription factors. These results suggest the MIEN1 promoter has a SINE Alu region that is hypermethylated in normal cells leading to repression of the gene. In cancer, the hypomethylation of a part of this repeat, in addition to the binding of USF, results in MIEN1 expression.

Original languageEnglish
Pages (from-to)65307-65319
Number of pages13
JournalOncotarget
Volume7
Issue number40
DOIs
StatePublished - 1 Jan 2016

Fingerprint

Alu Elements
Methylation
Prostatic Neoplasms
DNA Methylation
Upstream Stimulatory Factors
Chromatin Immunoprecipitation
Transcription Initiation Site
Methyltransferases
RNA Interference
Luciferases
Nucleosides
Genetic Promoter Regions
Epigenomics
Computer Simulation
Genes
Cell Movement
Proteins
Binding Sites
RNA
Technology

Keywords

  • DNA methylation
  • Epigenetic regulation
  • MIEN1
  • Prostate
  • SINE Alu

Cite this

Rajendiran, S., Gibbs, L. D., Van Treuren, T., Klinkebiel, D. L., & Vishwanatha, J. K. (2016). MIEN1 is tightly regulated by SINE Alu methylation in its promoter. Oncotarget, 7(40), 65307-65319. https://doi.org/10.18632/oncotarget.11675
Rajendiran, Smrithi ; Gibbs, Lee D. ; Van Treuren, Timothy ; Klinkebiel, David L. ; Vishwanatha, Jamboor K. / MIEN1 is tightly regulated by SINE Alu methylation in its promoter. In: Oncotarget. 2016 ; Vol. 7, No. 40. pp. 65307-65319.
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abstract = "Migration and invasion enhancer 1 (MIEN1) is a novel gene involved in prostate cancer progression by enhancing prostate cancer cell migration and invasion. DNA methylation, an important epigenetic regulation, is one of the most widely altered mechanisms in prostate cancer. This phenomenon frames the basis to study the DNA methylation patterns in the promoter region of MIEN1. Bisulfite pyrosequencing demonstrates the MIEN1 promoter contains a short interspersed nuclear Alu element (SINE Alu) repeat sequence. Validation of methylation inhibition on MIEN1 was performed using nucleoside analogs and non-nucleoside inhibitors and resulted in an increase in both MIEN1 RNA and protein in normal cells. MIEN1 mRNA and protein increases upon inhibition of individual DNA methyltransferases using RNA interference technologies. Furthermore, dual luciferase reporter assays, in silico analysis, and chromatin immunoprecipitation assays identified a sequence upstream of the transcription start site that has a site for binding of the USF transcription factors. These results suggest the MIEN1 promoter has a SINE Alu region that is hypermethylated in normal cells leading to repression of the gene. In cancer, the hypomethylation of a part of this repeat, in addition to the binding of USF, results in MIEN1 expression.",
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Rajendiran, S, Gibbs, LD, Van Treuren, T, Klinkebiel, DL & Vishwanatha, JK 2016, 'MIEN1 is tightly regulated by SINE Alu methylation in its promoter', Oncotarget, vol. 7, no. 40, pp. 65307-65319. https://doi.org/10.18632/oncotarget.11675

MIEN1 is tightly regulated by SINE Alu methylation in its promoter. / Rajendiran, Smrithi; Gibbs, Lee D.; Van Treuren, Timothy; Klinkebiel, David L.; Vishwanatha, Jamboor K.

In: Oncotarget, Vol. 7, No. 40, 01.01.2016, p. 65307-65319.

Research output: Contribution to journalArticle

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